85: Radius (in kilometres) of Tycho crater.

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86 - 1986, that is, year of the Challenger disaster.
On a happier note, year of Voyager 2's Uranus flyby.

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CE 87 - Year Claudius Ptolemy, developer of the definitive geocentric universe theory, was born

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88 - current number of recognized star constellations in the sky

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89 - years since Einstein published the paper presenting General Relativity (Annalen der Physik 49, 50). Among lots of other things, pointed to black holes and gravitational lensing.

(This makes up for my being a little to slow to get the "88 constellations" entry).

90- Approximate inclination, in degrees, of the rings of Uranus with respect to the orbital plane.

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91 - approximate orbital period, in minutes, of the ISS

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92 -- distance (in million kilometers) of closest approach to Earth by Mercury.

note: per corrections below, 92 is the distance (in million kilometers) on average between the orbits

93 -- average distance (in million miles) of earth from sun

SkyMap shows next time it is only 89 million km, in a couple weeks? And only 82 in 2015

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94 - (.6, that is) trillion km: 10 light years!

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Sheesh ---that's the last time a consult the attached website. I think I'll go rant about it on my blog...

In looking at The Nine Planets, it looks like 92 million kilometers is the average distance. (Between the orbits, that is).

95 - orbital period in hours of the planet detected around HD 76700. Not so much a hot Jupiter as a hot Saturn (although you'd hardly have icy rings in that location), at about 1/5 of a Jupiter mass.

96 - distance between Voyager 1 and the sun, in astronomical units.
Hats off to the most distant man-made object out there!

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97: 1597, that is.

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98: The number of the asteroid that shares its name with my daughter 8)

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99 - my age when Halley's comet returns in 2061

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100 Years ago when Einstein publish Special Relativty, an explanation of the photoelectric effect, and explained Brownian Motion. Not a bad year for someone, eh?

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Neptune- The original Dark Matter.

The author feels that this technique of deliberately lying will actually make it easier for you to learn the ideas. - Donald Knuth

Violet flower.. nice name 8)

101- How to Become an Astronaut 101

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102 - The last "uncertain" Messier catalogue object

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103- original number of Messier objects, and diameter, in thousands of light years, of M65

Edit: for clarification and correction

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How's that? The Sombrero galaxy begs to be included as M104. I can see excluding M40, and M102 was a phantom, but you must also be excluding the additional "late" entries that have become pretty enshrined. (I may have just opened a can of historical worms...)

And M65 really must be bigger than a star cluster!

104: Sombrero Galaxy

105: Artemis

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106: The Apollo CSM 106 (Charlie Brown) is better known as the command module of Apollo 10. I guess the two men in the LM (Young and Cernan) are the two people to come the closest to the moon without actually landing on it (hey, that would have been a good question for the ultimate astronomy quiz).

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Waaaaay too easy .
107 - years ago that Henri Becquerel discovered radioactivity in naturally occurring uranium ore.

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108 thousand kilometers is saturns polar diameter.

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109- The sun's dimaiter is 109 times larger than the earths

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110: Saturn V had a height of 110 metres (and then some).

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111: By comparison, the rocket that launched the first space satellite, the Soviet R-7, was 111 feet tall.

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111 - The course you take at Mesa Community college to learn more about astronomy.

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111- seven in binary.

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